Oki PT330 Guide De L'utilisateur page 52

7-1. Exiting to Previous Level
Hold the FEED button down for 1 second or more until the buzzer
sounds twice.
Release the FEED button after the buzzer sounds.
This returns to the previous level and prints the Setting group
options.
Setting
1.Memory Switch 1
2.Memory Switch 2
3.Print
4.Hardware
5.Interface
<Set>
Press FEED button for the number of times
as the same as your selecting item, and
wait more than 1 second.
<Return>
Continue to press FEED button more than
1 second.
50